Slew rate enhancement based on use of squaring circuits. Issue 3 (1st February 2015)

• Record Type: Journal Article
• Authors: Valero, M.R.; Thoutam, S.; Ramírez‐Angulo, J.; Lopez‐Martín, A.; Carvajal, R.G.
• Is Part Of: Electronics letters. Volume 51:Issue 3(2015)
• Page Start: 219
• Page End: 220
• Publication Date: 2015-02-01
• Subjects: constant current sources -- operational amplifiers -- detector circuits; slew rate enhancement -- squaring circuit -- SC -- current source -- op‐amp -- differential input voltage magnitude detector; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2014.3975
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A squaring circuit is introduced that boosts the tail current source of an opamp to improve its slew rate. It operates as a differential voltage magnitude detector, which generates opamp tail currents proportional to the magnitude (square) of the opamp's differential input voltage. Experimental results from a fabricated test chip verify current and slew rate enhancement between 900 and 1400% with respect to its initial value with <20% static current increase.